* {
  margin: 0;
  padding: 0;
}

a {
  text-decoration: none;
  color: black;
}

body {
  background-color: #f2f2f2;
  overflow: hidden;
}

.header {
  width: 1100px;
  margin: 0 auto;
  padding: 0 60px;
  height: 50px;
  display: flex;
  background-color: #fff;
  align-items: center;
  justify-content: space-between;
}

.header .userInfo {
  display: flex;
  align-items: center;
}

.header .userInfo .img {
  width: 30px;
  height: 30px;
  border-radius: 15px;
  background-color: blue;
  margin-right: 20px;
}

main {
  width: 1050px;
  margin: 0 auto;
  margin-top: 36px;
}

main .top {
  height: 68px;
  background-color: white;
  text-align: center;
  line-height: 68px;
  position: relative;
  color: #333;
}

main .top .left {
  width: 105px;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: absolute;
  left: 20px;
}

main .top .left .lt {
  font-size: 30px;
}

main .content {
  display: flex;
  flex-wrap: wrap;
}

main .content .item {
  width: 30%;
  height: 230px;
  background-color: white;
  margin-top: 20px;
  margin-right: 5%;
  border-radius: 10px 10px 0 0;
  box-shadow: 5px 5px 5px #c0c0c0;
}

main .content .item .item-row {
  height: 20%;
  box-sizing: border-box;
  border: 1px solid #f2f2f2;
  display: flex;
  align-items: center;
  padding-left: 20px;
}

main .content .item .item-row span {
  margin-right: 25px;
}

main .content .item .item-row .red {
  color: #ff3300;
}

main .content .item .item-row.startBtn {
  width: 100%;
  justify-content: center;
  padding: 0;
  color: white;
  background-color: #009600;
  border: none;
}

main .content .item:nth-child(3n) {
  margin-right: 0;
}
